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|
import rustc::syntax::ast;
export fn_attrs, arg_attrs;
export parse_fn;
type fn_attrs = {
brief: option<str>,
desc: option<str>,
args: [arg_attrs],
return: option<str>
};
type arg_attrs = {
name: str,
desc: str
};
fn parse_fn(
attrs: [ast::attribute]
) -> fn_attrs {
for attr in attrs {
alt attr.node.value.node {
ast::meta_name_value(
"doc", {node: ast::lit_str(value), span: _}) {
ret {
brief: none,
desc: some(value),
args: [],
return: none
};
}
ast::meta_list("doc", docs) {
ret parse_fn_(docs);
}
}
}
{
brief: none,
desc: none,
args: [],
return: none
}
}
fn parse_fn_(
items: [@ast::meta_item]
) -> fn_attrs {
let brief = none;
let desc = none;
let return = none;
let argdocs = [];
let argdocsfound = none;
for item: @ast::meta_item in items {
alt item.node {
ast::meta_name_value("brief", {node: ast::lit_str(value),
span: _}) {
brief = some(value);
}
ast::meta_name_value("desc", {node: ast::lit_str(value),
span: _}) {
desc = some(value);
}
ast::meta_name_value("return", {node: ast::lit_str(value),
span: _}) {
return = some(value);
}
ast::meta_list("args", args) {
argdocsfound = some(args);
}
_ { }
}
}
alt argdocsfound {
none. { }
some(ds) {
for d: @ast::meta_item in ds {
alt d.node {
ast::meta_name_value(key, {node: ast::lit_str(value),
span: _}) {
argdocs += [{
name: key,
desc: value
}];
}
}
}
}
}
{
brief: brief,
desc: desc,
args: argdocs,
return: return
}
}
#[cfg(test)]
mod tests {
fn parse_attributes(source: str) -> [ast::attribute] {
import rustc::driver::diagnostic;
import rustc::syntax::codemap;
import rustc::syntax::parse::parser;
let cm = codemap::new_codemap();
let parse_sess = @{
cm: cm,
mutable next_id: 0,
diagnostic: diagnostic::mk_handler(cm, none)
};
let parser = parser::new_parser_from_source_str(
parse_sess, [], "-", source);
parser::parse_outer_attributes(parser)
}
#[test]
fn parse_fn_should_handle_undocumented_functions() {
let source = "";
let attrs = parse_attributes(source);
let attrs = parse_fn(attrs);
assert attrs.brief == none;
assert attrs.desc == none;
assert attrs.return == none;
assert vec::len(attrs.args) == 0u;
}
#[tes]
fn parse_fn_should_parse_simple_doc_attributes() {
let source = "#[doc = \"basic\"]";
let attrs = parse_attributes(source);
let attrs = parse_fn(attrs);
assert attrs.brief == some("basic");
}
#[test]
fn parse_fn_should_parse_the_brief_description() {
let source = "#[doc(brief = \"short\")]";
let attrs = parse_attributes(source);
let attrs = parse_fn(attrs);
assert attrs.brief == some("short");
}
#[test]
fn parse_fn_should_parse_the_long_description() {
let source = "#[doc(desc = \"description\")]";
let attrs = parse_attributes(source);
let attrs = parse_fn(attrs);
assert attrs.desc == some("description");
}
#[test]
fn parse_fn_should_parse_the_return_value_description() {
let source = "#[doc(return = \"return value\")]";
let attrs = parse_attributes(source);
let attrs = parse_fn(attrs);
assert attrs.return == some("return value");
}
#[test]
fn parse_fn_should_parse_the_argument_descriptions() {
let source = "#[doc(args(a = \"arg a\", b = \"arg b\"))]";
let attrs = parse_attributes(source);
let attrs = parse_fn(attrs);
assert attrs.args[0] == {name: "a", desc: "arg a"};
assert attrs.args[1] == {name: "b", desc: "arg b"};
}
}
|
